So, here's a funny little programming challenge. I was writing a quick method to determine all the market holidays for a particular year, and then I started reading about Easter and discovered just...

I'm making a calendar generator in JavaScript. I need the Unix Timestamp for easter day midnight, for a given year. How can I do that (in JavaScript)? PHP's function can be found here.

Does anyone have a good algorithm to calculate what date Good Friday falls on given the year as an input? Preferably in C#.